>
> >cc-option checks to see if the flag is supported by $(CC) which could
> >be a completely different compiler from $(HOSTCC). Hence the above
> >can incorrectly supply/fail to supply the argument.
>
> Good point. New patch.
I am having this patch queued:
# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
# 2005/04/03 22:26:47+02:00 [email protected]
# kbuild: Use -Wno-pointer-sign when building for host
#
# Avoid lot's of useless warning when building host utilities.
# A brave sould may take a look sometime - but not all warnings are correct.
#
# From: Pawel Sikora <[email protected]>
# Signed-off-by: Sam Ravnborg <[email protected]>
#
# Makefile
# 2005/04/03 22:26:24+02:00 [email protected] +12 -4
# -Wno-pointer-sign for gcc 4.xx when compiling host programs
#
diff -Nru a/Makefile b/Makefile
--- a/Makefile 2005-04-30 00:35:17 +02:00
+++ b/Makefile 2005-04-30 00:35:17 +02:00
@@ -201,10 +201,10 @@
else if [ -x /bin/bash ]; then echo /bin/bash; \
else echo sh; fi ; fi)
-HOSTCC = gcc
-HOSTCXX = g++
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
-HOSTCXXFLAGS = -O2
+HOSTCC := gcc
+HOSTCXX := g++
+HOSTCFLAGS := -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCXXFLAGS := -O2
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
@@ -538,6 +538,14 @@
# disable pointer signedness warnings in gcc 4.0
CFLAGS += $(call cc-option,-Wno-pointer-sign,)
+
+HOSTCFLAGS += $(shell if $(HOSTCC) $(HOSTCFLAGS) -Wno-pointer-sign -S \
+ -o /dev/null -xc /dev/null > /dev/null 2>&1; then \
+ echo "-Wno-pointer-sign"; fi ;)
+
+HOSTCXXFLAGS += $(shell if $(HOSTCXX) $(HOSTCXXFLAGS) -Wno-pointer-sign -S \
+ -o /dev/null -xc /dev/null > /dev/null 2>&1; then \
+ echo "-Wno-pointer-sign"; fi ;)
# Default kernel image to build when no specific target is given.
# KBUILD_IMAGE may be overruled on the commandline or
-
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